Bentham offers a range of filter detectors with spectral responses “close” to the desired function. For example, the DH400-VL photometric detector provides high-precision illuminance and luminance measurements.
Some of the most common detector types are listed below:
| Model | Spectral function | Wavelength range | Normal calibration |
| DH400_VL | Photometric | 380-780nm | lux |
| DH400_VS | Scotopic | 380-780nm | lux |
| DH400_UVA | Radiometric UV-A | 315-400nm | W/m2 |
| DH400_UVB | Radiometric UV-B | 280-315nm | W/m2 |
| DH400_UVC | Radiometric UV-C | 250-280nm | W/m2 |
| DH400_UV | Radiometric UV | 250-400nm | W/m2 |
| DH400_R01 | Blue’ radiometric | 400-500nm | W/m2 |
| DH400_R02 | Red’ radiometric | 700-800nm | W/m2 |
| DH400_R03 | Visible’ radiometric | 400-800nm | W/m2 |
| DH400_R04 | Near-IR radiometry | 800-1000nm | W/m2 |
| DH400_R05 | Radiometric ‘vis-NIR | 400-1000nm | W/m2 |
| DH400_yyy | Custom/ User-defined | Between 200-1000 nm | As required |
The ORM400 optical radiation meter is ideal for displaying measurements from the DH400 range of detectors, as well as third-party current-generating detectors.
The ORM400 has a USB 2.0 interface and is supplied with powerful calibration and data display functions. It includes a library of standard spectral light sources that customers can add. This allows greater accuracy and flexibility when measuring light sources with a filter-based instrument.
